Sentences with phrase «in shallow seas»

Areas between these cones, on the other hand, appear to contain only sediment deposited by waves in a shallow sea.

They may be a kind of sun block, protecting corals from intense light in shallow seas.

Rocks in Greenland that have been preserved for 3.7 billion years show evidence of microbes living in a shallow sea on early Earth

All of the limestone in the quarry formed in a shallow sea basin, as evidenced by the large number of marine fossils such as snails, mussels and sea urchins.

These glaciations may have played a large role in mass extinctions of species that had previously thrived in the shallow seas surrounding landmasses.

The shells were deposited in a shallow sea in present - day West Virginia and Ohio in the latest Pennsylvanian (~ 300 million years ago).

Those increases correspond to the expected global temperature rise in shallow seas within the next 50 and 100 years, respectively, by the Intergovernmental Panel on Climate Change, assuming no additional efforts to reduce greenhouse gas emissions are put in place.

The first is an accumulation of algae and other microorganisms in shallow seas, like those that periodically formed as the continents drifted apart and moved together again over hundreds of millions of years.

Euan Nisbet, a geologist at the University of London, points out that the Arctic, where the warming is expected to be strongest, is vulnerable — both on land and in shallow seas there are hydrates that are stabilized mostly by low temperatures rather than by high pressures.

They were contained in rocks which Izett says may have been formed by a tsunami, following the impact in the shallow sea that covered Iowa.

The new findings are helping the researchers to understand how very early organisms survived despite the high level of radiation, and how life was even able to develop in shallow seas with sufficient sunlight.

Some 150 million years ago in what is now Northern Bavaria, Archaeopteryx — the oldest bird species yet discovered — inhabited a subtropical environment characterized by reef islands and lagoons set in a shallow sea that was part of the primordial Mediterranean.

With a long snout and webbed, flipperlike hind feet, the extinct species was probably well adapted to swimming in shallow seas but also able to crawl onto land with its hoofed forelimbs.

«These differences indicate different hunting styles and habitats in the shallow sea.

In a road cut near the Missouri River in central South Dakota, paleontologists uncovered signs of a fight to the death waged 73 million years ago in a shallow sea that covered much of what is now the Great Plains.

Mild oxygen levels in shallow seas but oxygen - poor deep oceans lasted for some 1.3 billion years during a time that has been dubbed the «Boring Billion» but eventually led to the development of mitochondria that now power multicellular planet and animal life (Nick Lane, New Scientist, February 10, 2010; Rachel Ehrenberg, Science News, September 29, 2009; Johnston et al, 2009; and H.D. Holland, 2006).

These current microbe mineral mounds appear in shallow seas, Nutman's team notes.

Spend a glorious 1/2 day on the calm inner reef waters at a Belize Island (Caye) National Park, as you snorkel in the shallow sea that teams with vibrant fish and colorful coral.

The first deposition of limestone was around 200 million years ago and the second period was around 50 million years ago when most of the land in the country was submerged in a shallow sea.

You will get to visit Mawun Beach in the morning followed by Lancing «Secret» Beach and finishing off at Selong Belanak where you can chill in the shallow seas for the afternoon or hire a surf board (optional) for those who have caught the bug.

Then ancient rifting and spreading happened in the shallow seas.

While most Triassic marine reptiles lived in shallow seas, plesiosaurs and ichthyosaurs were strong swimmers that lived in the open seas and gave birth to live young.

On our home turf, craters that form in shallow seas or wetlands hardly make an imprint in the soggy ground and are quickly subsumed.

Some of these limestones are composed of parts of organisms, primarily the remains of crinoids that thrived in the shallow seas.

NATURAL CLEANERS Seagrasses, flowering plants that grow in shallow seas, can decrease bacterial contamination in the surrounding water.

Young children will be happy building sandcastles and jumping waves in the shallow sea, and there is a wide choice of restaurants and tavernas available for eating and drinking.

Highlights: Ten to 13 million years ago, sands were deposited in a shallow sea, compacted and uplifted, creating the white sandstone cliffs that provide shelter from the wind at Drakes Beach.

«This research suggests that the first tetrapods that crawled onto land were, in fact, living in shallow seas.»

They were found lying down in shallow sea, which, according to researchers, could provide the first evidence of an environment where early life might have thrived near the start of Earth's geological record.

In shallow seas that dominated subtropical regions, warm salty water became dense enough to sink to the bottom.